D1122112312233231312323132322331311331323132311331323132321123232211   >>    D112211231223323131232313232233131133132313231133132313232112323221   <<    D1122112312233231312323132322331311331323132311331323132321123232213   >>      D1122112312233231312323132322331311331323132311331323132321123232212   >>